2000 Accord V6, Shuts off while driving

THAISONT

MEMBER
2000 HONDA ACCORD
6 CYL
2WD
AUTOMATIC
248,000 MILES

My car has a check engine light, diagnosed it as cylinder misfire and it alternates each time I run it. But, lists 3 cylinders each time.

Light has been on almost past 3 years and no problems.

Today driving I lost power and the engine shut of completely when coming to a stop. I tried for about a minute to try and restart it kept cranking and finally able to start it again.

The battery is good and don't think it is the starter as it sounds normal while starting.

Have had it at multiple mechanics and none has ever had a definite solution on the check engine Misfire.

Does anyone have an idea for the root cause of the problem? The car runs now and seems to be fine, for now.

Thanks,

Tyson

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Tyson:
A misfire can be caused by several things. It could be fuel related or ignition related. Since it is 3 cylinders that are affected, to me it sounds more fuel related. I would recommend checking the fuel pump pressure first. If it is within spec, then focus on the ignition. It could be a bad crank sensor causing the problem. However, the only way to be sure is to have the engine live scanned. Basically, a mechanic hooks up a scanner that reads what the computer is doing. It can pick up on where the problem is coming from. For example, if the computer loses a signal from the crank sensor for a second or two, the mechanic can see it.

I hate to say it, but without live scanning the computer, it becomes a guessing game. What even makes it harder is the fact that the problem has to happen while the scanner it attached, or the problem part finally goes bad and then can be located. My first guess is a bad crank sensor, but again, without scanning it while driving and having the problem happen.

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Thursday, May 18th, 2017 AT 11:32 AM

THAISONT

MEMBER
2 POSTS

UPDATE: still problems

Hey Jacob / Nickolas,

I took the car to a local shop. They ran the codes and random misfires on all 6 cylinders came up. I mentioned the crank sensor and they ruled it out instead they suggested EGR valve cleaning. After that there were still codes they readjusted head valves and the check engine light has been off for 200 miles.

Now the car still shuts off and won't turn back on until numerous tries. The car cranks, battery is good, stater doesn't grind at all when cranking.

Do you have a better idea of whats the issue, any help and input would help. Thanks.

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Thursday, May 18th, 2017 AT 11:32 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

I have to be honest, random misfires aren't caused by valve adjustment issues unless every cylinder is really out of adjustment. The EGR could cause it, but again, I don't think they are looking in the right place. I really feel it is fuel related. Did they check fuel pump pressure?

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Thursday, May 18th, 2017 AT 11:32 AM